HT instruments HT712 - Manual (Page 9)

HT712
EN - 8
4.4.2. AC voltage and frequency measurement with 2 test leads
CAUTION
The maximum input for AC voltage is 600V. Don’t try to measure higher
voltages to avoid risks of electrical shocks or serious damages to the
instrument.
Fig. 4: AC voltage and frequency
measurement with 2 test leads
1. Turn the selector on .
2. Insert the black test lead in the COM jack and the
red probe in the V+/Ω jack (Fig. 4).
3. Connect the red probe and the black test lead to
the poles of the circuit under test; the voltage value
will be displayed (automatic range detection).
4. By pressing the “ ” function key you can
display the frequency value instead of the voltage
one and vice-versa.
5. Should you get the message "
O.L
" it means that
the detected voltage exceeds the limits which the
instrument can measure. In this case stop the
measurement by disconnecting the test leads from
the circuit under test to avoid risks for yourself and
for the instrument.
6. If you want to activate the HOLD function refer to
chapter 4.2.